Smoke-box for locomotives



(NoMode1.)'-

A. J. CROMWELL.

Smoke Boxes for Locomotives.

'NO. 243,111. Patented June 21,1881.

Fig.1.

WITNESSES. INVENTOR.

08%;. BY ATTORNEY.

N PETERS FhuXn-Lithogfaphlr. Wahinglom D. G

UNITED STATES PATENT OFFICE.

ANDREW J. GBOMWELL, OF BALTIMORE, MARYLAND.

SMOKE-BOX F'OR LOCOMOTIVES.

SPECIFICATION forming part of Letters Patent No. 243,111, dated June 21,1881.

Application filed April 25, 1881.

exactly described as follows, reference being bad to the accompanyingdrawings, in which Figure 1 is a view of the device in centrallongitudinal vertical section, and Fig. is a cross-sectional viewthrough the centers of the exhaust-nozzle and smoke-stack.

My invention relates to what are known as smoke-boxes orextension-fronts for 1000- motive-boilers, designed to arrest the largercinders and sparks and prevent their escape through the smokestack. Anobstacle has, however, been met with in the use of devices of thisclass, arising from the fact that they either were comparativelyinefficient as sparkarresters, or else th at while arresting the sparksthey were apt to throttle the draft.

The object of myinvention is to produce an abundant and uniform draft.and to arrest all except the smaller sparks and cinders. To filter thesmoke from a locomotive so as to remove these small particles of solidmatter is an absolute impossibility without obstructing the draft to adegree that would render the whole device inoperative; but a much nearerapproximation to a complete separation of the cinders than hasheretofore been reached is possible, and that result is attained by thedevice about to be described. Afurther importantresultis reached by myinvention, in that the draft through the flues is rendered more uniform,as is also the combustion of fuel in the lire-box.

In the drawings, A is the boiler, having flues a and smoke-stack B ofthe usual construction.

D is the extension-front or smoke-box, havingthe usual netting, 1),extending horizontally from about the level of the upper tier of fluesto a point near the front of the box, where it is bent upward, as shownat b.

E is the exhaust-nozzle, having a removable tip, 6, secured to thenozzle by bolts d.

U is a perforated basket secured to the netting and inclosingthe exhaustnozzle, as shown. This basket operates, in connection with the (Nomodel.)

nozzle, somewhat on the principle of an injector, and produces a strongdraft inward through the perforations from all-sides, and the flames andproducts of combustion are drawn through the fiues, and are practicallyunobstructed in theirpassage to the front ofthe box. The currents arethen forced to turn sharply upward and backward, momentarily, as itwere, coming to rest, when the cinders fall and remain upon the bottomof the box. The vertical baffle-plate, which in the well-known form ofsmoke-box depended-in front of the fiues, in great measure defeated thisend, as it directed the draft horizontally over the bottom of the box,agitating and lifting the fallen cinders. 1t, moreover, choked the draftof all except the lower flues.

The tip of the exhaust-nozzle is made removable, so that one of anydesired length may be placed on the nozzle, it being only necessary totake out the bolts d to release the tip and remove it to apply a newone.

The device is readily applicable to engines already in use, eitherprovided or not with the extension-front and netting, and in practicaluse it has fully established its cfiiciency and superiority.

What I claim is- 1. In a locomotive smoke-box, a netting extendingsubstantially horizontally from a point above the level of the uppertier of flues, and

provided with a depending basket inclosing the exhaust-nozzle, the partsbeing arranged and operating as set forth.

2. In a locomotive smoke-box, and in combination with the horizontalnetting, an exhaust-nozzle having a removable tip inclosed by adepending basket, the parts being arranged and operating as set forth.

3. In combination with the netting I), having inclined portion 1), theperforated basket secured to the netting and depending in front of theflues, and the exhaust-nozzle having its tip located within the basket,whereby an injector draft is caused through basket and netting, as setforth.

ANDREW J. OROMWELL.

Witnesses:

R. D. WILLIAMS, J. O. GITTTNGER.

